Prepare the brownie mix according to the directions on the box (or use your favorite homemade recipe) using the oil, egg, and water.

After baking, remove the pan from the oven and set the oven to broil at 500-550 F.

Cool brownies for about a minute then sprinkle the marshmallows over the warm brownies. Make sure to cover most of the area. Sprinkle the graham crackers on top of the marshmallows. Broil about 4-5 inches from the heat for 30 seconds to a minute until the marshmallows are golden brown. Watch carefully so that they don’t burn. Sprinkle with Hershey’s milk chocolate bars.